BIOMAT Database Logo BIOMAT Database Logo

Effective temperature of red-blood-cell membrane fluctuations. 2011

Eyal Ben-Isaac, and Yongkeun Park, and Gabriel Popescu, and Frank L H Brown, and Nir S Gov, and Yair Shokef
Department of Chemical Physics, The Weizmann Institute of Science, Rehovot, Israel.

Biologically driven nonequilibrium fluctuations are often characterized by their non-Gaussianity or by an "effective temperature", which is frequency dependent and higher than the ambient temperature. We address these two measures theoretically by examining a randomly kicked particle, with a variable number of kicking motors, and show how these two indicators of nonequilibrium behavior can contradict. Our results are compared with new experiments on shape fluctuations of red-blood cell membranes, and demonstrate how the physical nature of the motors in this system can be revealed using these global measures of nonequilibrium.

UI MeSH Term Description Entries
D008560 Membrane Fluidity The motion of phospholipid molecules within the lipid bilayer, dependent on the classes of phospholipids present, their fatty acid composition and degree of unsaturation of the acyl chains, the cholesterol concentration, and temperature. Bilayer Fluidity,Bilayer Fluidities,Fluidities, Bilayer,Fluidities, Membrane,Fluidity, Bilayer,Fluidity, Membrane,Membrane Fluidities
D008954 Models, Biological Theoretical representations that simulate the behavior or activity of biological processes or diseases. For disease models in living animals, DISEASE MODELS, ANIMAL is available. Biological models include the use of mathematical equations, computers, and other electronic equipment. Biological Model,Biological Models,Model, Biological,Models, Biologic,Biologic Model,Biologic Models,Model, Biologic
D003198 Computer Simulation Computer-based representation of physical systems and phenomena such as chemical processes. Computational Modeling,Computational Modelling,Computer Models,In silico Modeling,In silico Models,In silico Simulation,Models, Computer,Computerized Models,Computer Model,Computer Simulations,Computerized Model,In silico Model,Model, Computer,Model, Computerized,Model, In silico,Modeling, Computational,Modeling, In silico,Modelling, Computational,Simulation, Computer,Simulation, In silico,Simulations, Computer
D004910 Erythrocyte Membrane The semi-permeable outer structure of a red blood cell. It is known as a red cell 'ghost' after HEMOLYSIS. Erythrocyte Ghost,Red Cell Cytoskeleton,Red Cell Ghost,Erythrocyte Cytoskeleton,Cytoskeleton, Erythrocyte,Cytoskeleton, Red Cell,Erythrocyte Cytoskeletons,Erythrocyte Ghosts,Erythrocyte Membranes,Ghost, Erythrocyte,Ghost, Red Cell,Membrane, Erythrocyte,Red Cell Cytoskeletons,Red Cell Ghosts
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D013314 Stress, Mechanical A purely physical condition which exists within any material because of strain or deformation by external forces or by non-uniform thermal expansion; expressed quantitatively in units of force per unit area. Mechanical Stress,Mechanical Stresses,Stresses, Mechanical
D013696 Temperature The property of objects that determines the direction of heat flow when they are placed in direct thermal contact. The temperature is the energy of microscopic motions (vibrational and translational) of the particles of atoms. Temperatures

Related Publications

Eyal Ben-Isaac, and Yongkeun Park, and Gabriel Popescu, and Frank L H Brown, and Nir S Gov, and Yair Shokef
Red blood cell membrane fluctuations and shape controlled by ATP-induced cytoskeletal defects.
March 2005, Biophysical journal,
Eyal Ben-Isaac, and Yongkeun Park, and Gabriel Popescu, and Frank L H Brown, and Nir S Gov, and Yair Shokef
Red blood cell membrane mechanical fluctuations in non-proliferative and proliferate diabetic retinopathy.
November 2004, Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie,
Eyal Ben-Isaac, and Yongkeun Park, and Gabriel Popescu, and Frank L H Brown, and Nir S Gov, and Yair Shokef
Effective cell membrane tension protects red blood cells against malaria invasion.
December 2023, PLoS computational biology,
Eyal Ben-Isaac, and Yongkeun Park, and Gabriel Popescu, and Frank L H Brown, and Nir S Gov, and Yair Shokef
Thermal fluctuations of red blood cell membrane via a constant-area particle-dynamics model.
October 2005, Biophysical journal,
Eyal Ben-Isaac, and Yongkeun Park, and Gabriel Popescu, and Frank L H Brown, and Nir S Gov, and Yair Shokef
Thermal instability of red blood cell membrane bilayers: temperature dependence of hemolysis.
January 1988, The Journal of membrane biology,
Eyal Ben-Isaac, and Yongkeun Park, and Gabriel Popescu, and Frank L H Brown, and Nir S Gov, and Yair Shokef
The red blood cell membrane.
February 1985, Clinics in haematology,
Eyal Ben-Isaac, and Yongkeun Park, and Gabriel Popescu, and Frank L H Brown, and Nir S Gov, and Yair Shokef
The red blood cell membrane.
August 1968, Clinical pediatrics,
Eyal Ben-Isaac, and Yongkeun Park, and Gabriel Popescu, and Frank L H Brown, and Nir S Gov, and Yair Shokef
Red blood cell membrane disorders.
January 1999, British journal of haematology,
Eyal Ben-Isaac, and Yongkeun Park, and Gabriel Popescu, and Frank L H Brown, and Nir S Gov, and Yair Shokef
Red blood cell membrane defects.
March 2003, Reviews in clinical and experimental hematology,
Eyal Ben-Isaac, and Yongkeun Park, and Gabriel Popescu, and Frank L H Brown, and Nir S Gov, and Yair Shokef
Fluctuations of the red blood cell membrane: relation to mechanical properties and lack of ATP dependence.
May 2008, Biophysical journal,
Copied contents to your clipboard!